Improvement in machines for planing clapboards



l; ATKINS. Machines for Planing Ciapboards. 4 No. 136,201. 1 PatentedFeb.25,1873..

JAMES ATKINS, or AUGUSTA, MAINE.

IMPROVEMENT'IN MACHINES FOR PLANING CLAPBOARDS.

Specification forming part of Letters Patent No. 136,201, dated February25, 1873.

To all whom it may concern:

Be it known that I, JAMES ATKINS, of Augusta, in the county of Kennebecand State of Maine, have invented a new Improvement in MachinesforPlaning Olapboards, of which the following is a specification:

My improvement relates to that class of machines which plane the side ofthe clapboard and joint the thick edge at the same time, and has for itsobject thefeeding of the boards so that the jointing of the edgestraight will be secured, and the feeding of the board and planing ot'the surface in the most perfect manner will be insured; and it consistsin an arrangement of heavy feed-rolls geared together in pairs, asinordinary surface-planers,

but with a series of spurs on each lower roll of the pair, and anadjustable arrangement of the lower rolls for causing them to correspondexactly to. the inclined surface of the bed of the machine, whereby thesaid objects are secured, as will be hereinafter fully described.

Figure 1 is a plan view of my improved machine with one ot; the topfeed-rolls broken out.

Fig.2 is a transverse section taken on the line 00 a: of Fig. 1. Fig. 3is a partial horizontal section taken on the line 3: y of Fig. 2; andFig. 4 is a transverse section of one of the lower feed-rolls.

Similar letters of reference indicate correspondin g parts.

A represents the lower feed-rolls, and B the upper ones, of which thereare two pairs in a machine, each pair being geared together by wheelsCkeThese rolls are of the size of large feed-rolls. The upper ones arearranged in a horizontal plane with the planer D, but the lower ones-areinclined so that they will correspond at' the top exactly with theinclined bed E, and they are provided near the lower end with twoparallel rows of spurs, F. G represents the edging-tool; H and I,guides.

To allow 0? adjusting the lower rollers, as required, they are journaledin adjustable bearings K L in the hangers M. The bearing K is adjustedby the three screws N, and another screw, 0, is arranged against the endto take up the end play, said screws being supported in the hangers. Theother bearing Lha-s oval enlargements P on two sides, which fit invertical grooves in the hanger so that it will line with the journalwith only one adjustingscrew, Q, under it.

These heavy feed-rolls guide the clapboard by the spurs F, and at thesame time carry it through straight, because the lower feed-rolls, as itwill be observed, are perfectly parallel with the bed, whereby thespurs, when passing over the upper part of it, where they engage theboard, revolve in lines perfectly parallel with the guides, and, as thespurs are sure to guide the board independently of the guides, securethe perfect jointing of it if the the said rolls are properly set. '1 Itis for this reason that the journals of the lower rolls'are madeadjustable.

Mere guide-rolls will not accomplish what I seek to do-tha-t is, toguide the boards straight by the spurs, for, if placed under the feedrolls, the feed will not be strong enough, and if used withdouble-geared feed-rolls they cannot be placed anywhere that thefeed-rolls will not in a measure destroy their effect; therefore it isimportant that the guide spurs be used on the lower rolls of double feedrolls;

- nor will conical rolls or any other similar contrivance, acting withthe ordinary guides I H to keep the edge of the clapboard against theguide, work well, for, as they come to the planer with their uneven orirregular edges against the guides, the dressed edges will come out inthe original shape. Ionly use the front .guide I in adjusting-the end ofthe board as I

